Rotary single sleeve-valve motor



April 8, 1930 v a. E. THISLER 1, 53,356

ROTARY SINGLE SLEEVE VALVE MOTOR Filed May 7, 1928 2 Sheets-Sheet -1 anew/"mp April 8. 1930. E. E. THESLER ROTARY SINGLE SLEEVE VALVE MOTOR Filed May 1928 2 Sheets-Sheet 2 Zen wve/wto b Patented Apr. 8, 1930 TED STATES EDWARD E. THISLER, F HARRODSIBURG, KENTUCKY ROTARY SINGLE SLEEVE-VALVE MOTOR Application fi1 ed,May 7,

This invention aims to provide a novel internal combustion engine in which the piston is mounted for reciprocation-in a rotary valve, novel means being provided for rotating the valve, and the valve having a single port:

which serves both as an admission port and an exhaust port. Another object of the in:

vention is to provide novel means torre'ciprocating the working parts. Otheriadvah ,tages will be made manifest hereinafter, and

itwill be understood that a mechanic, working within the scopeof what is claimed, may make changes'without departing from the spirit of the invention. r

' In the drawings Figure 1 is a longitudinal section of the engine; .1 'f

' Figure 2 is an elevation of'the valve;

' Figure?) is a cross section on the line 33 of Figure 1. g g

The crank case 1 includes a base 2 and a body 3 joined together by bolts 4, or other wise, and having bearings 5 in'which the crank shaft 6 is j ournaled, the crank appearswing at 7. At its upper end, the body 3 of the crank case has a thickened portion 8 in which is formedan annular oil chamber 9 having anoutlet 10 which discharges into the crank case 1. The upper end of the body 3 of so the crank case l is supplied with an inwardly projecting flange 11, and above the flange 11 there is a gear compartment 12 in the upper end of the body 3 of the crank case.

7 The cylinder is designated by the numeralg i i'ng ring :34 which cooperates with the inner 1 14 vand is surmounted by' a' cap 15 held in place by securing elements16, the cap having a central extension 17, theextension being spaced from the cylinderwall to give room for the rotary valve hereinafter described.

The cap 15 and the cylinder 14 are water jacketed as at 18, in any suitable way, and

in order to remove the water from the capv or head 15 when the water is drained out of the water jacket of the engine head, and the other end of the siphon pipe extending. down wardly into the water jacket of the cylinder, p

as shown in Figure 1. The head 15 of the siphon pipe 19 is provided, oneend of the 1928 Serial No. 275,822. I I

"engine has a depressed portion'20 in which is mounted a spark plug 21, the sparkv plug projecting downwardly into an inverted funnel shaped opening'22 in the cylinderhead 'ing, the opening 22 communicating withjthe combustion chamber of the enginef It will be "understood that any suitable means for firing the enginemaybe provided, the spark plug 21 being typical of any'suitable means for igniting the charge; .The'cylinder 14 is provided near to'its lower end with an outstanding annular 'foot 23 which is connected to the'thickened portion 8 of the crank case by m'eans'of securing elements 24. The lower end of the cylinder 14 extends downwardlyinto the gear compartment 12.

as-shown at 25'. The'cylinder 14 is equipped near to its outer end with oppositely disposed ports 26 and 27.

There is a worm chamber 28 in thethi'ck ened portion 8' of the crank case, and the lower-portion. ofthe cylinder 14 has anopening 29 which communicates with the worm chamber. 'A- shaft 30 is supported for rotation I in the engine "frame and carries a worm31"located in the. worm chamber 28. The shaft 30 is driven from the crank shaft 6' inany suitable way, for instance, by means of a chain drive 32 indicated in- Figure 1. A sleeve valve 33 is journaled for rotation in the cylinder 14, the upper end of the valve 33beirig rotatably mounted between'the cylinder wall andthe extension 17 ofthe cylinder head, the extension 17 'carrying a packsurface 'of'the valve 33. .The lower end of crank case and has a pinion35 which extend's throughthe opening 29 in thecylinder 14 and engages with the'worm'31, so*that.when rothe valve" 33 rests on the flange not the tation is imparted to the worm,-rotation will 'be transmitted to the valve 33 The valve 33 has a. single port'36, so located as to register with the ports 25 and26 of the cylinder. Around the port 36, in the outer surface of the valve 33, there are grooves 37 adaptedto hold oil,,thereby to formna seal around the port 26. Above and .below the ort 36, the valve 33 is provided with circumferential oil grooves 38 48. A pitman 39 L via is pivotally connected with the crank 7 in the usual way, and is pivoted to a piston which is mounted for reciprocation in the valve 33.

The lubricating system for the engine is simple but highly efiective. It comprises a gear pump 41 mounted within the base 2 of the crankcase .1 and operated by a shaft journaled in a bearing 42 mounted on the crank case, the aforesaid shaft being connected to the crank shaft '6 bevelled gears .43, the shaft being connected with the pump 41 by bevelled gears 44. The pump 11 takes oil out of the crank case and forces it upwardly through a pipe 45. The pipe 425 has a branch 46 which delivers oil into the worm chamber 28. From the worm chamber 28, the surplus oil is delivered back into the crank case 1 through the-outlet .10. The pipe 4:5 has a lateral branch 47, and by means of this branch, oil is deliveredinto the grooves 48 of the valve 33. .At its upper end, the pipe has a branch a9 by which oil is -del-ivered into the grooves 38 ofthe valve 33. In the midst of thegrooves 38 the-re is an opening ,50 in the valve 33, the opening 5.0 being disposed opposite to the branch 4E9.

13y thiseconstruction, oil is admitted inside ofthe'upper end of the valve 33, and the valve .islubricated, where it turns .on thecentral extension 17 of the cylinder head E5. The oil in the grooves 458 of the valve 33 can find its way-intoa-spiral groove 51 formedin theouter surface of the valve 33 and extended downwardly stout-he pinion 35. By means of the grooveel, the outer surface of the valve 7 33 is lubricated, between the grooves 48 and the-,pinion 35-. Any desired number or openings..52:are formed in the wall of the valve 33, theseopeningswcommunicating with the interioriof the valve-.33. By means of the openings -52, surplus :oil is delivered inside of the valve :33 and back into the crank case. 'By means of it'he groove 51, some oil is delivered upon the @gear 35, but the gear gets most of its :oil from theworrn chamber 28,:i'nto which the oil is delivered by the branch 46., The .oil 'in thegear -.compartment12 is kept atia constant levelxbecause there is an opening 53 in the :8 iof the crank case, a the op ening 53 being located a 'suffioient distance above :the flange 11. In general operation, the :piston 40 re-.

oiprocatesiin the valve 33, theJpor-t 36 of-the valve zooming into-registration with the ports -26 ranidv27 aof'the cylinder, to admit the charge and tolet out the exhaustgases. The valve 33 is rotated,-.to -bring the port 36 into and'out registration the ports 26 and '27, as

raiforesaid, through the instrumentality of the 'worml3ll which meshes with the-gear 351011 the lower end of the valve 33, the worm '3 1'being eperatedi from the :crank shaft 6 by Way of the-chain :drive 32'.

"The device lfiorming the" subject matter of applicationis of the :rotary single sleeve valve type, the valve being provided with a single port, and the invention may be embodied in any four cycle internal combustion engine. The device is characterized by extreme simplicity, in that there are practically no more than two moving parts in each cylinder, to wit, the valve 33 and the piston 40. The rotary valve 33, with its single port 36, has many advantages over valves of a different kind: for instance, since the valve has but one port, the chances of loss of compression is avoided. The gases from the carbu'retbr serve tocool and keep clean the edge-s of the port 33 in the valve. The port 36 is at approximately ninety degree positions when the intake and exhaustis efiected, as :shown in Fig. 3, and, consequently, the combustion chamber is sealedagainst leakage. The general construction of the engine ,is such that the bad effects of the hot exhaust gases are cut down to a minimum. The sleeve valve 33 is so constructed that it can be machined and accurately constructed, thereby renderit possible to secure lubrication with a minimum amountof oil. The valve 33 rotates at one half the speed of the crank shaft 6 and the valve, therefore, will be kept true and round, both inside :and out, .th-us providing for snug fit of the "valve within the vcylinder 14, and about the piston 40. One of the great advantages of the valve 33,, with the single large port 36, is that at the conclusion of each. firin g stroke, the compression or chamber isadequately coo-led before another compression and ignition of-the charge is brought about.

What is claimed is:

In an internal combustion engine a crank case havin a worm chamber and provided with an oi-liout let leac from the chamber to the interior of the crank case, .a cylinder on the crank case, a cap on the cylinder and having-anextension prolonged into 'the cyli-n- 'der and spaced from the inner cylinder wall, a single sleeve valve jounna'led in the cylinder and extended at one end into the space between the inner cylinder wall and the outer surface of the extensiointheinner surface of said of the valve being direct contact with the outer surface of the extension, and the outer surface of the valve being in direct contact with the [inner cylinder wall, the valve having a port and :being provided on itsouterrsurface with oil-holding grooves disposed about the :port, th'e valve beingsupfplied on its inner surface with :end and intermediate sets of circumferential grooves 10- cated on opposite'sides of-thesaid' oil-holding grooves, the valve {being equipped on its Wall of the cylinder and the outer surface of the valve and into the end set of circum V ferential grooves, the valve'having a transverse opening in the midst of the end set of grooves and carrying oil from the lastspecified end of the conduit to the inner surface of the valve and the outer surface of the j extension, the conduit having a branch discharging on the intermediate set of clrcumferential grooves and having another branch that discharges into the worm chamber, means for forcing oil from the crank case through the pipe to the conduit, a Worm Wheel on the valve and a Worm meshing with the Worm Wheel and located in the Worm chamber.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.

EDWARD E. 'THISLER. 

